Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/34542
Minimum number of transfer units and reboiler duty for multicomponent distillation columns
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Some guidelines to evaluate distillation columns, considering only basic thermodynamic data and principles, are provided in this paper. The method allows a first insight to the problem by simple calculations, without requiring column variables to ensure rational use of energy and low environmental impact. The separation system is approached by two complementary ways: minimum and infinite reflux flow rate. The minimum reflux provides the minimum energy requirements, and the infinite reflux provides the feasibility conditions. The difficulty of separation can be expressed in terms of number of transfer units (NTU). The applicability of the method is not mathematically limited by the number of components in the mixture. Several mixtures are rigorously simulated as illustrative examples, to verify the applicability of the approach. The separation of the mixtures, performed by distillation columns, is feasible if a minimum NTU can be calculated between the distillate and bottom compositions. Once verified the feasibility of the separation, the maximum thermal efficiency depends only on boiling point of bottom and distillate streams. The minimum energy requirements corresponding to the reboiler can be calculated from the maximum thermal efficiency, and the variation of entropy and enthalpy of mixing the distillate and bottom streams.
Matèries (anglès)
Citació
Citació
PLESU, Valentin, BONET RUIZ, Alexandra, BONET I RUIZ, Jordi, LLORENS LLACUNA, Joan, IANCU, Petrica. Minimum number of transfer units and reboiler duty for multicomponent distillation columns. _Applied Thermal Engineering_. 2013. Vol. vol 61, núm. 1, pàgs. Pages 67-79. [consulta: 26 de febrer de 2026]. ISSN: 1359-4311. [Disponible a: https://hdl.handle.net/2445/34542]